Cooking to scale is also not a problem if you know what you're doing in the kitchen. Smaller kitchens and a lack of proper hardware can make cooking more challenging, but it's super easy to scale a recipe up and store away the extra portions. There are entire communities dedicated to meal prep tips and strategies.

It more comes down to training and time for most people, not a lack of hardware.

I used to think in terms of communal efficiencies (hence moving into a warehouse), but that idealism was quickly abated by the realities of living with other humans, most of whom it turns out, are broadly selfish and inherently lazy.

The problem is common work/school/etc. schedules mean that the bulk of the utilization is at the same time; there isn't a lot to be gained by sharing unless you are in a quasi-executive commune, where a shared kitchen (and other living space) is already a norm.

If you want more people to choose to live in communes, good luck.

There used to be something called a 'dining club' -in the Anglosphere it mostly descended from Oxbridge student dining clubs (some were regimental dining clubs). Various social clubs in the 1800s Anglosphere descended from these sorts of things. I used to belong to one; the Berkeley City Club. In addition to providing maybe hundreds of people with the services of a professional chef, it provides something not appreciated in the modern day, with people staring at their phones: an actual social circle, and a place to go after work that isn't a bar.

These sorts of things used to be quite common, and formed the nucleus of many political associations and movements, but they became less popular with the social atomization of the 1960s.