No, I don’t think so.
Firstly, for many people, some of the steps in their lives that have formed them have had a negative influence and are not something to be thankful for. For example, a former friend of mine became an alcoholic as a result of the hard-drinking culture of his city job, which destroyed his marriage and eventually his employability. He ended up losing his mind, looked like a tramp - and died last year, alone. The body was not found for a fortnight. So I think it is a bit complacent and Pollyanna-ish to imagine that every step is something to be thankful for. For those of us that have ended up comfortable, or fulfilled in some way, maybe yes, but that is not the lot of everyone.
Secondly, while certain steps in life undoubtedly have a result, it seems to me something of a teleological fallacy to attribute purpose to them. Whose purpose?