I agree with you, of course there may be, but there must be other solutions, not just that one. Apart from the fact that it poses a problem of data confidentiality, I find that we must remain as independent as possible from the external services.
I made the effort to host my own server to be as independent as possible, and I do not like being dependent on a lot of services, even if they are free.
Do not forget one thing, when a service is free, in general we are ourselves the merchandise.
Take the example of reCAPTCHA. Thank you Google for putting this wonderful tool at your disposal, how generous is it? What people do not know is that every time they use it they work for free for Google by associating words with images and perfecting their image recognition system.
I know it is not always possible, but Una should develop his own solutions that would distinguish it even more from other cms.