"Hire the best engineers" is somewhat simplistic, and I don't think the article offered great insights on that, but ... all business where I worked that had problems actually Getting Stuff Done were due to either bad hires or excessively bad code (which is often the same as "bad hires", or rather, the result of it).
I've never seen tooling really help. I mean, it's nice, saves time and effort, ensures some degree of quality, and all of that, but it doesn't really move the needle all that much in getting stuff done compared to having a team that works well together. Actually, I've seen desperate adoption of tooling in futile attempts to fix these more fundamental issues, which is how some companies end up with 40 linters that moan and whine about every little thing so everyone is adding //nolint statements every 20 lines.
In short, I do think that it's good advice, although personally I'd phrase it as "hire the right people". Someone who is a good engineer – maybe even among the best – will not necessarily fit in well with any team, or any job, and there are other important qualities too aside from engineering skill. A junior can be a good hire for your team, even in a startup scenario.
How you actually hire the "right people" is of course not easy.