He'd have been a fool had he not made it:

    “Telegram’s abrupt increase in user count to 950M caused growing pains that made it easier for criminals to abuse our platform,” admits CEO Pavel Durov.

Telegram has many side and I won't criticise the tool, but as a platform it's been the tool of choice for distributing seriously f'd up CSAM material in recent months.

I used to consult on things digital with LEO's some time past and still keep an eye on "outreach activity" - services that upload user porn get waves of videos with CSAM type thumbnails that redirect to pages asking users to log into Telegram channels - frontending a swath of cyber crime from credential sniffing to blackmail, to straight up legit child abuse and trafficking (with a segue through "virtual CSAM" and pig butchering).

If not Telegram then some other platforms would be used for the social networking | spruiking side - but either way there's a need for moderation to keep the digital streets clean.