The issue is that IT/tech does not know business key words or excel spreadsheets, and finance does not know tech. Nowadays it's getting blurred with data scientsts and excel crunchers that can do a mean macro (and know more than Vlookup!)
Finance people love automation. Finance people love excel. Finance people understand sunk cost fallacy. Finance people understand change. Finance people need help to embrace change, to guide decisions and make sure it's the right "tech" for the company.
Many times the right tech is O365/Sharepoint/Flow automation, or nintex. Yeah, but
it is not souless, it guides the entire company, it ist he company pursestrings.
Get them on your side, understand how to read a P/L sheet, what FPA does and you'll not only earn respect, you'll have your name said at all the exec/leaderships meetings and you'll be loved.
That's what I do in companies (consulting, self run) and w/o a good background in finance, and tech I wouldn't be where I am today (major in stats, tech was hobby, stats/math is everything etc.)
So I fully disagree 100%. You had it so close with SAAS and capex vs opex, but you missed it. But yes it does move expenses around and opex is easier to navigage then a full sunk cost capex.