My experience in the provinces where the local health authorities had set up a vaccination centre for the province was different to the image in the OP.
I thought it was extremely well organised and professional.
I am sure that the demand is greater in the more urban areas and those areas more affected by Covid, however on the day that I experienced there were hundreds in the queue when I arrived and likewise upon my departure a couple of hours later. People were being processed efficiently throughout.
Today I witnessed another vaccination centre in a neighbouring province. From my vantage point it also appeared to be well organised.
The biggest problem seemed to be where to park the vehicles. The demand was substantial.