Why is my question “not constructive”?

Your question is more of feedback, not a technical question.

This is a technical support forum.

We are Apple Volunteers and not employees, we don't handle feedback.

Feedback should be properly sent to Apple here: Feedback - iPhone - Apple

Lock your screen first before placing it in your pocket. You could even accidentally call a number if you do not lock the screen first. Of course we know the name for those types of calls, but the solution is simple. That is just my suggestion, for any further feedback you would like to send to Apple, you should definitely use the link provided by Zachyy.

Stephen McNutt wrote:

Thank you, Zachyy. Makes perfect sense.

You're very welcome, and thank you for the understanding. I highly suggest you submit feedback to Apple via the link I provided above, as they review each and every submission they get. With enough feedback on this issue, they can incorporate it in a future update. Best of luck.

One more thing I thought of you can do, but it may not solve it entirely. You can change your Auto-Lock setting to the lowest time, 30 seconds, before it locks the iPhone. This will reduce the chances of it happening in the meantime. But I would still suggest you submit feedback to Apple.