Unless you are paying for something genuinely premium, they are all basically the same. Even then, you may be blocked as VOIP numbers have this problem in this age when few have a plain old home phone service (POTS).
A number of companies own most of the free and paid text apps. WhatsApp, WeChat, Telegram, Signal, etc. have different branding but similar tradeoffs. It's mostly for convenience and sense of security whether real or not. A lot of people using their everyday number are far more trusting (and foolish) than they should be.Most people do not worry about privacy or identity theft issues until something goes wrong for them personally.
Providers are entitled to set their own rules, and clients are just as entitled to decide whether those rules work for them. If a provider insists on a particular messaging app or no texting apps, and you are not comfortable with it, the simplest option is to move on. Don't whine about it.
The same applies if you're asked for government ID or a deposit to meet the lady. That is a personal boundary some are fine crossing it, others are not. Similarly, some like to use their actual full names and pics in social media and dick heads chastise them if they don't.
Provider safety gets brought up a lot in discussions, but there never is a silver bullet. Someone with bad intentions (I always wonder what set them off in the first place) will use a prepaid mobile phone with a prepaid payment card and rotate mobile numbers regardless if an app is involved. It's not rocket science.
I feel ID verification discussion tends to become emotional and unproductive. People have very different comfort levels, and that is unlikely to ever change. All it leads to is online arguments and beratement. Providers may have ulterior motives or agendas for insisting no texting apps, deposits, or government ID. Horny bastards are too gullible to understand this concept. Hence all the guys who get scammed from the ladies on LL.
At the end of the day, it comes down to knowing your own limits and respecting theirs. If something does not sit right with you, simply walk away without turning it into a bigger issue.