I still use google voice like that, give it out when I absolutely have to give a phone number (because they verify by text or whatever) but have the app set to silent.

Google does a really good job of filtering out the telemarketing calls so the rare message is usually valid.

Pretty much the only time I have to open the app is this one stupid company (coughWalmartcough) which insists on doing 2FA via text every single time I want to check the balance on my prepaid debit card.