Multiple companies I've worked at have been in the position of their competitors suffering security breaches. In all instances there were communications sent to all staff not to speak externally pointing to the inident for publicity/promotion of our service. While you can't turn a blind eye, it's just not a good look. Besides, tomorrow it could always be you/your company.

Telegram has some positives, but the lack of e2e without secret chats is inexcusable--notnto mention secret chats' notifications are crippled (no option to see sender or message content.) If only Signal had working profile avatars instead of seeing some ancient Google+/Facebook/social media photo that sync'd to their contact list eons ago they didn't even know was there... Small UX things can make all the difference, haha.

What good is e2e encryption if it's backdoored?

First of all he should have some sliver of prove and not just complain about things that are the same on his software.

And if he was serious about it and not just bs marketing he could actually recommend an app that is actually significantly improving on the security.

What good is his claim about WhatsApp if he has no proof?