@Kenneth12 Personally, as a host I make every effort to be accommodating, and to change my plans when guests unexpectedly change their plans. (I've stayed up till 2.30am to let in a guest whose flight was delayed, after the guest kindly messaged "I realise this is too late for me to arrive, I'll go to a hotel." Because of HIS consideration, I welcomed him in!)
BUT, I also acknowledge that hosts have the right not to be held hostage by guest changes of plan. It's not the host's fault or problem if the guest fails to make it by the pre-arranged check in time.
Airbnbs are NOT hotels. Yes, some operate like them, but others are unashamedly amateurish & there is nothing wrong with that! As a host yourself you should know that ANYONE can list ANY place on Airbnb... You use the word 'professional' upthread.... But we are NOT professionals, necessarily, tho' some may be...
Some hosts run a chain of highly professional lettings, like yourself, as their full time job, or have staff to do so...
Other hosts let a spare room, or their own place whilst away, like your host, and juggle this sideline with a busy life, maybe a full time job, & goodness knows how many other responsibilities. Some of these hosts have to have very strict & narrow check in times, & it's the responsibility of the guest to comply.
You can't expect a one-man operation to man their 'reception' for hours on end , nor days in respect of cancelled flights. It's always been the Airbnb way to negotiate arrival time with the host & stick to it.
As a guest, surely it's your responsibility to be careful what you book if you are flying from abroad, & book a place with more of a hotel set up, not book a private home with an owner of limited availability? You can't expect your host to cancel THEIR trip away because YOU are late!
"Live like a local!" - Don't expect a hotel!