Powerpoint slides need space at the bottom for subtitles

I give a lot of talks online these days and I always put my own subtitles on them.

I am very disappointed when I see subtitles covering an important list on the screen.

Please could you make it a rule that all PowerPoint slides have subtitles, or if not subtitles, room for the automatic ones.

Here is a template showing the part of the slide that needs to be kept free of text.