Sure, but then there's the slightly more complicated economic calculus: do we build our own tooling now, for a significant up front cost, or do we buy the SaaS which we might use essentially forever for an unknown future TCO?
Absolute zero ongoing commitments? Very rarely.
Negligible ongoing commitments compared to the outsourcing alternative? Many, many times.
I don't think it's clear-cut. Some SaaS has worked out remarkably well for me and others I wish I had just built the thing in-house. Also, few providers give a way to actually get your data back out in a usable fashion, so you tend to get locked in without substantial cost to back out.
The slightly more complicated question is "do we invest in optimizing SaaS costs/utilization? Or use those resources to start building our own?". But even for this question the right answer is usually fairly obvious.
If it was so easy, why are the companies in the article "fretting"? Because putting values on "good", "opportunity" and "makes sense" (not even counting the fact you have no control over the SaaS raising prices or going out of business in the future) is harder than we can spend $400/month or $50/month.