1. Yes I can see the spiritual value in your comment,
BUT, what was the immediate point did Jesus wanted them to understand?
Ans. HE had been delivered from death, and was in His NEW IMMORTAL BODY, and was NOT a spirit.
2. We could speculate about how Jesus entered the room in many ways, however the fact remains that the doors were shut, for fear of the Jews coming after them. With such a mind set, no one leaves the doors open for anyone to just walk in,
John 20[19] Then the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled for fear of the Jews, came Jesus and stood in the midst, and saith unto them, Peace be unto you.
[20] And when he had so said, he shewed unto them his hands and his side. Then were the disciples glad, when they saw the Lord.
Then that event took place again with Thomas, 8 days later. Again, the focus was on Jesus and His NEW and Immortal body, and not what we shall speculate or spiritualize.