Let's not analyze the whole thing as a whole piece, but bit by
bit.
Firstly, ignore whether Lord Buddha exists.
Secondly, take certain words out, and interpret it. TS could be
right in a way that some Buddhists are indeed good at memorizing,
but failed to understand the concepts behind it. In such context,
he/she would be right.
But since the TS didn't elaborate what Buddhists are good at
memorizing, he/she could well be wrong as well.
Lastly, a religion WILL always be shallow if one doesn't understand
the concepts behind it.
Forgive and forget - to say it is easy, but have many managed to do
it?