@Hesta54
Because as we’ve seen by the low percentage of U.K. citizens that take advantage of FOM ( 1%) mostly retirees in Southern Europe,
Something like 1.5 million UK citizens are registered as living permanently in the rest of the EU - about 2.5% of the approx. 60m British citizens.
'Retirees in Southern Europe' is a lazy stereotype. There are fewer than 400,000 UK retirees living permanently in the EU. The other one million UK citizens are living normal lives doing normal jobs.
As I wrote earlier, there are approx. another 1 million British workers who rely on FoM in order to do their jobs - pilots, engineers, consultants, reps, drivers etc. Add to this the British students studying in the EU on Erasmus and other schemes, and then add in the British citizens who flip and flop between the UK and Spain and something like 2.5 million British citizens (4% of the population) take advantage of FoM at any given time.
This is just a snapshot of the number in the EU at any given time. Over the last 40 years, millions of UK citizens have used their FoM rights in order to live, study and work in the EU at some point in their careers. Builders and bricklayers in the 1980s, project engineers working for Airbus, BMW and other European companies, 200,000 UK students have studied in the EU under Erasmus, 50,000 holiday reps every year and so on.
And for balance, 3.5 million EU citizens in the UK represents less than 1% of the EU population - Britons are more likely to move to the EU than EU citizens are to move to the UK.