People are creatures of habit. If we learn something one way, we’re prone to stick to it. Less in a “my way or the highway” sense and more so in a “if it ain’t broke, don’t fix it” one.
Not every security tool is right for every environment, and just because one set of tools works well for you now at one job and company doesn’t mean it will work well – or at all – if you change jobs or especially, verticals.
At an established financial institution, for example, you may be part of a large team of experienced professionals who’ve worked together to build out a highly refined, capable infrastructure.