Real life is not code golf. We do not build things entirely for ourselves. We build things for our employers, for our co-workers, for our family members and for our friends. We build to create value for someone and value is not a one-to-one correlation with the weight of a site in KB.

If I can make it easier for me and anyone working with my site in the future by sacrificing 50-150 KB then I will take that deal any day of the week. That is what abstractions are for. That is why we do not work in byte-code. We pay for convenience in clock-cycles and disk space.