Yes, Jesus believe that lowly people are valuable. Let us take an an example of a widow who put in a cent into the treasury whilst many were making large contributions into the treasury.  Jesus called His disciples and said to them, "Truly I say to you this poor widow put in more than all the all the contributors to the treasury. (Mark 12:41-43).

Jesus saw that the poor widow used her last cents to contribute, and did this from her heart. Unlike the many people who were doing it to baost how rich they were. Now the widow's offering is important to God because she did it with a pure heart and with good intentions. Therefore she is more valuable than others.

 Another example is when Jesus was eating with sinners.  The pharisees gumbled saying, "This man receives sinners and eats with them." (Luke 15"1-2). Jesus believes that sinners are more valuable because they need a leader to show them the way. when they grumbled Jesus said it is not those who are in good health who need a doctor but the ill.