What does this have to do with anything?
The reason people are trying to get to the UK from France (and other countries) is they are trying to apply for asylum in the UK. Not in France, in the UK. And the reason they have to do that in the UK is the fact the UK cancelled the possibility to apply for asylum at its embassies. So if you don't want people coming from France to ask for asylum, enable the option to apply at the embassy and you are done. Simple, and you will save many lives.
Now of course the same applies to all western countries. There are lots of people trying to come here, some for legitimate reasons, some not, and also we need some of them because of shortage of workers, even if we don't say it loud, because even more would try to come. All western countries allow to apply for asylum only on their soil, thus creating a humanitarian catastrophe, because while the right to asylum is enshrined in the Universal Declaration of Human Rights, it does not say how hard can it be to apply.
But all of this is to say it does not matter whether France is or is not a safe country. We could arrange for international cooperation where asylum seekers could ask for asylum and while their application is processed they would stay in some safe country, but next to no safe country will do this because of internal political reasons, so what remains is treating asylum seekers like hot potatoes and not people. It's a sad state of affairs, but there are too many factors and no easy way to direct the blame.