Perhaps you haven't done much overseas research...
Not all information will be online and free. Scotland's People certificates are excellent value and contain a huge amount of information which you don't see for many other countries.
No not really. My mums side is from England, came to Australia in the 1800's.
My dad was born in Scotland and moved to Australia in 1960.
In NSW we have the BDM index online and you can search someone's name and on the preview it lets you see year of registration and parent's names.
I find it hard on the SP website because you can't see parent's names before you pay to view the record.
I also have ancestry subscription so I can view as many records as I like without having to pay for each one. I get a bit annoyed on SP when I have to pay to view and it's the wrong person.
Maybe I am doing it wrong, but I am working with little information. Only going by marriage records.