I feel the post is misguided. Pick any career out there and you'll find that in a complex enough cranny of it there is mathematics. That doesn't mean that plumbing IS doing mathematics, or fixing the washing machine IS doing physics; at least not in any substantial sense. If you're cutting web APIs, writing wrappers, wrangling pixels; you wont find maths useful to you very often.

If you find yourself working in data science, cryptography, compilers, formal design, etc then obviously maths will be indispensible to you. Having said that most the maths that you need in order to pick something up and implement it is within your grasp and you'd probably have to learn it anyway even if you did know some maths. Recall, there is no "know maths"; you only ever know some maths, and once you've done it long enough you develop an ability to "do maths" which is in some bizarre way independent from any actual maths you know.

As a final note and honestly to hell with lamenting the past. I think if I could do it all over again; I would... and when I did I'd most probably want to do it all over again, again.