From having worked in a different industry before tech, I would say the tech industry is a lot more accommodating than most industries when it comes to whatever employees care about in their personal lives, including parenting.

It's totally fine to not want kids, and nobody should be having kids because they feel pressured to or anything like that.

But most people do want to have kids, and if that is the case, deciding not to have them so you can focus on your career alone is probably not a wise choice. Raising children is a deeply rewarding experience that (assuming good health) lasts your entire lifetime, much longer than your career.

In general, in the west in particular, we often let ourselves be too focused on the short-term material world (how much stuff can I buy, how can I keep my costs low), and not enough on the important immaterial things like relationships and experiences that are more than just numbers in a bank account. Long-term that's a recipe for unhappiness.