Yes there are 62 conservative MPs not seeking re-election, but as usual, the devil is in the detail.
I'm sure some (many?) of them don't think they can win, but there are also boundary changes, and no doubt other factors - a very brief search found that one of those not seeking re-election is 83, another is 76!
There are also 17 Labour MPs not seeking re-election, who presumably don't see retaining their seat as an issue given current poling figures. Which just goes to show there can be many reasons behind such as decision.
Churn of personnel is part of the natural process.
Personally I don't think any MP should be able to seek re-election past the age of 70.
Kindly note - this post was not written in defence of the Conservative party, who won't be getting my vote.