Your ratio to views to revenue can be rather complex and hard to work out it isn't necessarily get X amount of views and you have X revenue, as Youtube might not class some views as monetised views, also CPM might be different depending on ads being shown, where they are being viewed from etc etc.
Determining whether or not YouTube is worth it really boils down to what your trying to get out of it / what you want to get from YouTube. If you want to earn a full time wage and can successfully grow your channel to achieve this then yes YouTube is worth it, if your looking to just post because you enjoy it then yes Youtube is worth it. However if you want to get rich quick, use clickbait for example and are gaining money by stealing content, monetising things you don't have the rights to then no I would say it isn't worth it.
Ultimately it depends on you.