You're misguided but that's expected because your reading of the game isn't credible in the slightest, as evident by "economy rates in ODIs are meaningless" and also by how highly you rate Imam.
But as you're so misguided, I'm happy to help you work out where you've gone if you could answer the following questions:
1. Did Shaheen bowl well in the last 3 x ICC tournaments (2019 WC, 2021 and 2022 WT20s)?
2. Who was Pakistan's best bowler in the last 3 x ICC tournaments (2019 WC, 2021 and 2022 WT20s)?
3. During the last WT20, did Shaheen look anywhere near 100% fit?
4. Has Shaheen been struggling for injuries and fitness over the last 12 months?
5. Does Shaheen look 100% fit during this WC?
Look let's cut out the crap. I know exactly where your criticism of Shaheen stems from and it has nothing to do with his perform
Every Pakistani bowler for the first couple of years looks a million dollars and then reality sets in.
Shaheen Afridi's novelty lasted till the World T20 in 2021 and that was it because he was only a couple of years into international cricket. Even in the World T20 World Cup 2021, he had zero penetration after that India opening overs blitz. He was just economical. That's it. Didn't take many wickets in that tournament. But that's ok because T20's economy creates wickets for others as well.
With regards to him being injured and not being fit, then that's on him. If he isn't fully fit, he has no right to play. He needs to self-evaluate himself and be honest saying that I'm not ready to give my 100% to the team. By being in the team, while only half-fit, he's actually doing a disservice to the Pakistani team. He's hogging a place for someone who can come in and give his 100%. So your argument that Shaheen isn't delivering because he's injured falls flat. Imagine if Haris Sohail is injured but insists on playing in the team, wouldn't he have stolen a place from Saud Shakeel? Would that have been fair?
Coming to Imam, the way Pakistan cricket team plays its cricket, Imam is actually the most important player in the team. People still do not realize that it was Imam over the past couple of years that was the glue that held the innings together and allowed Fakhar and Babar to unleash. Now that Imam is out of form, we have seen how badly exposed Fakhar and Babar are. If we decide to play a style that mirrors England, then Imam has no place but till the time Pakistan plays the way it currently does, the biggest disaster in this World Cup is Imam going out of form.
For your point about economy rates in ODIs, I stick to what I said. Economy rates in ODIs and Tests don't matter that much. They matter a lot in T20s. The shorter the format, the more important the economy rate. The larger the format, the economy rate starts taking a backseat. You can be most happy with Nawaz's 0-50 in 10 overs. However, I'll take 3-75 in 10 overs from anyone every day of the week and twice on Sundays. Anybody who does not understand this should not be talking about cricket.
And lastly, my criticism of Shaheen simply stems from the fact that he is an overrated bowler. Ravi Shastri said the exact same thing on commentary. Maybe Shastri is also inspired by Misbah, I guess. Shaheen is my fellow countryman. I would never wish ill on him. However, I will also not be oblivious to his shortcomings.