Yes, this is exactly the main reason! That combined with no need to update the app. When a PWA updates and you load it, guess what...you already have the newest version. What if a big security risk was found in you're favorite app. Uh oh, got to update...assuming you know about it and can wait until update time, you can fix it then. But til then...not ideal.
D.buzz has figured this out. Even when you download Dbuzz to your phone or PC, you're really not. Instead, you're simply adding a small icon-link that launches the PWA app in your chosen browser. Think of it as a dbuzz tab. And yet, it still looks feels and acts like an app on you're phone (doesnt look feel and act like another tab). @dbuzz
I will say that natives apps likely run faster, can likely do more complicated things, and PWAs are likely not always even possible (depending on what the goal is). But, if possible at all, I like PWAs, first due your phone space reason and secondly due to updates
I try to get as few apps on my phone as possible. I think that with too many apps, you will have more difficulties to keep them up to date, which requires space and also brandwith. Also since, I hate these updates, I often jump them which then opens security issues.