My father paid several Scottish (and state approved) genealogists in the 70’s to do family research from the original records.
After the internet (and the LDS church) put copies of the original documents on-line you can see a lot of “wishful thinking” in the reports he received.
If I were serious about genealogy I wouldn’t count on anything online or at LDS. Just in the USA mid-Atlantic states alone, some lines are hard to establish as the Union forces had no problem burning down courthouses that contained vital records. But we’re supposed to believe that we can trace back 500 years to some royalty? I prefer to say I come from a long line of Irish peasants.