At first glance, it seems difficult to you because you need to download several wallets, but after searching, you will find that you do not need 99% of the altcoins, and therefore one or two wallets is sufficient.
Yes, I totally agree. Normally the reason I would use multi-coin wallets in the first place is because I need to receive an obscure coin & network combo e.g. USDT on TRC-20, and there are maybe only 2 or 3 wallets that support such coins.
It kind of puts me off of using most altcoins (that is not even counting the thousands of dormant coins & tokens that will never get a wallet) - if there isn't a suitable wallet for them, why bother?