Potential missionaries are often afraid that they might have to ask someone for money. Yet those same people will have no problem asking for donations or even physical help when a fire burns a house in the neighborhood. That is noble! What is the difference? The difference is the focus of attention. Who is the beneficiary, the victim, or the rescuer? Is helping people escape a burning house more noble than helping people escape a burning eternity?
Beliefs inform values. Informed people should act. Lives must be saved. People must be warned by those who see the need, even at great personal cost.
Money is how we move work. Whether or not you invite help, the timely work of telling unreached people groups about Jesus Christ will not be accomplished without a team of individuals using their gifts, working together as a Body. When there is no coercion and God's Spirit is leading the response, inviting people to engage is noble.
Some people work at home and send funds abroad so that missionaries can hire local workers. Some realize that there are necessary skills that cannot be hired, so they give their lives to serve in support of planting churches where Christ is unknown. Church planters live in remote places to teach God's word, disciple people, and translate the Bible to establish churches.
Career rescuers need help and provision beyond their personal means to accomplish their tasks. Giving their lives, while trusting God to provide through His people to accomplish His work, is noble. (1 Cor. 12)