Many players may say that the most reliable casino platforms are the safest and they may be right, but I am very selective with my casino, I play in a casino where I have the Freedom to Play what Suits me and I like.
We cannot be precise in saying that this casino is the safest and this one is not the safest for use not until we have a particular encounter with the way they operate in their services, gambling is just about personal interest and not on what is being common by other gamblers in using their own respective gambling platforms, everyone has his own choice and why they have made the decision.
You have spoken well and you are completely right, deciding which casino is perfect, good or bad is all based on personal perspective and perception, and also, personal experiences with such casino.
Like I have always said, online gambling casinos are all unique in their own ways, and what I like about a casino may not be the same thing someone else likes about that same casino, like It is commonly said that, a man's food is another man's poison, we all as individuals have our individual likes and hates, just same way our faces are different.
So, in the nutshell, choosing a casino and considering it the best one among the rest, is all based on person perceptions, not on general opinion, even if the casino was chosen based on the opinion of others, you as the gambler still have to decide if the casino is what you really want and like.