The only validation you should expect and need is self-validation.
Your work is absolutely valid and important. Your efforts are absolutely appreciated and worthwhile. But people are stuck in their own heads and work and stress and concerns and desires and validation loops and it takes actual work to break out of that to not only offer appreciation but to even realize that they need to offer it.
And for that reason, you should also really appreciate anyone that validates you.
This is why I feel Becky Chambers should be the future of Sci-Fi.