We agree the interval between shots is due to an inability of the government to secure a sufficient number of doses.
However, the vaccines do appear to be doing as hoped. Ontario LTC cases and deaths down, cases and deaths dropping in the UK and some U.S. states.
Here's a link from the CDC if you want to learn more
https://www.cdc.gov/coronavirus/2019...nes/facts.html
Among the advantages is that if you do get the virus you will not get as sick and more likely survive.
But if you don't want to take it that is your decision to make.