Not who you asked but I think it comes down to risk/reward. The consequences of some user finding a big in most websites is low, compared to the risk of an astronaut finding a bug the hard way whilst attempting re-entry.

There is genuinely a reasonable and rational argument to “testing requires more effort than fixing the issues as users find them” if the consequences are low. See video games being notorious for this.

So, industry is more important than language I’d say.