Companies capitalizing on convenience is not new. If you want to go to the ultimate end of the spectrum where you don’t need to give up any info to a third party, open source applications have you covered. Firefly iii, Actual Budget to name two with existing bank integrations.
It comes down to your personal risk tolerance and appetite. If you have no tolerance, don’t take the risk and stick with your convictions instead of grumbling that you had to give your bank statements to download a scammy Tetris app.
I think another big difference is Lemmy still feels like it is inviting at least a small amount of conversation. Whereas Reddit increasingly feels to me like it collectively prefers to upvote only one correct answer, and stamp down everything else.
I think with federation in general we have more of a chance to preserve what we value in each instance. Whether that is constructive conversation, or cited responses, or memes only/ no memes…
I look forward to being a part of multiple, quite different feeling networks of communities.