Every user of electrum should do that, but unfortunately some are bit lazy without checking the legitimacy of the app, even I downloaded electrum from their official website, I always verify its signatures if they are really from the devs. Coz just you now, websites can be hacked as well as the file link can be edited there, hackers can do such things and make things like its originally normal and legit.

You can still trust them for smaller amounts and micro spending, but for storing large sum of assets,? just use HW or electrum.