In a capitalist economy everything is about the money,you need it to spend to buy stuff to pay the rent or mortgage etc, strikes have been a part of working class life for many years, just some unions used to have more power and grunt than the drs currently have.
We have seen dilution of the need for drs, since the creation of nurse practioners, drop in or walk in centres,usually just nurses,practice nurses,111 service , pharmacies, and paramedics.
and with the capitalist assault on everything government owned by this gang currently in power, reducing staffing costs is a huge demand to make the service saleable to the private sector, some staff will move on,the drs are just the start of the sell off of the nhs into lots of constituent parts.