Your comment can be summed up by: "I have no idea how the EU or any of its institutions works but I'm going to make a knee jerk comment because I'm ignorant and proud".
EU members have more representation than just the number of MEPs they send, like a seat in the European Council, Council of Ministers, a Commission portfolio and representation in the multitude of other EU institutions. Not to mention that in many of these institutions Scotland would have the same voting share as some of the bigger members like Germany or France.
And alternatively your 1/10 of a country doesn't stick, because it can easily be argued that Scotland would have more a lot more power within the EU via the representation it would have in the EU institutions than it currently does within the UK, especially when taking into consideration the limited number of devolved matters the Scottish Parliament can legislate on. For example Scotland via the EU Council would be able to shape EU's foreign policy and they would also have some competence in trade policy (as seen with CETA and how smaller members can roadblock it).