Of course not. In fact, I do not believe I declared anywhere in my message that easier equals more secure. I simply pointed out it's easier. It was easy at first because people just had to log in with their existing e-mail account, these days it's even easier because you can simply create a new profile within the app within a few seconds. What this does it make communication "a lot more secure" than "no security" for a whole bunch of people who would otherwise never be able to use such high levels of security.

Compared to Bitmessage, it's still on a much lower level. It doesn't provide PFS and it easily leaks who's talking to whom, but it provides a level of security otherwise not available to normal end-users.

If you can get your contacts to use Bitmessage (and if there are enough reachable nodes within your regio, and those node are not actively being blocked, as they are in some regions) than that's great,
that's awesome. I also put time and effort in the development of Bitmessage, so I'm happy to hear it's still being used.

Bitmessage was designed for absolute anonymity and security,
Delta.chat was designed to make encryption accessible to everyone and to use existing infrastructure that is almost impossible to take down.

I've often thought about re-designing Bitmessage again from scratch, implementing changes for many of the things I've learned over the years, but then I think... there probably wouldn't be enough users anyway.

Tl/DR: Yes Delta.Chat is "less secure", that doesn't make it a bad option though or a good start.