You can't do it with just Ledger Live and you need the device too.
Same applies to when you want to send coins.
If you don't want to send / access your coins, you don't need to install a different application.
When you want to send coins uninstalling and installing a different application literally takes less than 30 seconds.
I have installed BTC and ETH apps via Ledger Live and it was not so easy as it was the first time and checking the computer and the device was a pain but now I am used to it.
It really isn't hard at all.
Open ledger live -> ledger manager -> Click on 'install' -> accept it on the nano -> Done.
Also, while doing it I got logged out due to inactivity from Ledger Live and then again entering the PIN, password etc.... It also took a long time to sync for the first time and I got errors while doing it which I had to fix (updating the old firmware 3 hours and 30 minutes for adding bitcoin wallet).
Well, you should keep your firmware updated all the time. That is not related to uninstalling/installing apps at all.
And you don't get logged out after a minute of inactivity.
As I did not uninstall any apps/update any apps, I have no clue but it's certainly not so easy as installing apps on my mobile and laptop.
No, it is way easier.
3 Clicks and 30 seconds.
I really don't see any issue at all.