Are the P1 cans thinner than the others listed in the the original post, probably. That said, in ~40 yrs. of DIY OC, never had a filter can deform in PC use.
So, if using and paying more for a thicker can make you feel better, so be it. Judging for the popularity of P1 and Classic and Purolator variants like PZ, QS, Proline, Promotive and Advance Auto Total Grip here, wouldn't appear to be a major issue here.
So as far as can thickness compared to the othere, are you crazy, probable not. Are you crazy for not using a P1 based on can thickness, based on results reported here, that's another matter. Right now one can buy 3-4 P1's for what an M1 or BDP cost. Great value.
And based on r_r's testing here, P1 and Classic, have excellent filtration and flow.
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and i know ppl say Bosch D+ is a rebaded P1,
You need to do a search and more reading. It's been explained here numerous times, recently even, they are NOT the same. Many posts on it, including store display pics, showing they are not the same. Just the latest thread.
https://bobistheoilguy.com/forums/posts/2102811/