There simply aren't enough beds in the system to deal with any normal Winter crisis and not enough capacity and funding in local councils to deal with the associated quick discharges from hospital.
It would be interesting to see the figures for people re-admitted during the Winter months ?
Winter is a very difficult time for the NHS, that has been the case ever since I started working in the NHS more than 20 years ago. The difference this year is that, along side the normal Winter pressures you have an additional new pressure, a novel virus that effects staff and patients.
This virus requires treatment that is normally only required for a relatively small percentage of the normal admissions. Increasing cases means you have all these people who need this treatment for Covid and all those people who normally need this as a treatment for other conditions, add in staffing issues due to infection ( 48hrs post last symptoms for norovirus and 10 days minimum for covid ) and you have the perfect storm.