We could argue about the amount needed in this case but for me , it is the principle that is important.
I've had to fly to the UK at very short notice(my parents are elderly and have recurrent problems) .I don't know how long I will be there for, it could be a week or it could be 3 months. Money is important.because we're not well off so I have to find the best options.
The flight costs normally range from 600E downwards and I obviously end up going for cheaper flights even if they are several hours drive away. The next consideration is the baggage rules because that raises the basic price considerably. (flights that start off seeming very cheap soon add up when you have to include baggage costs)
I need to take several boxes of reservoirs and cannulas + backup pens, strips insulin etc. (the EU regs say I can get on going care win my EHIC but can you imagine trying to get pump supplies in the UK?)
Airline rules have to allow for everyone and it has been a great help to discover that most airlines allow an extra baggage allowance for medications/equipment The pity is that they don't advertise it.