This is the lie the industry keeps telling itself, especially in print.

Vendors come in and bullshit your bosses and the purchasing authority about how awesome their tools are and all the things it can do.

By the time the developers catch wind of it the check has already cleared, and they -have- to use this tool because someone with firing authority paid for it and you're not going to get away with embarrassing them by calling them on their bullshit (young me tried, young me failed).

I'm not aware of any development team that consciously picked Atlassian. Atlassian gets picked for them. Their success is in selling to the management chain, not in being a good product. Because they aren't (but then neither are many of their commercial competitors).